Worcester bosch 42cdi

[g0jfp]

HUMING through pipes when boiler not on programed to be on
42cdi switched to eco
runs heating and hot water all day ok
at night after heating switches off
we can hear the HUM through the pipes
iv looked at boiler with no burner light on
but I think pump is still running
any help

 

[Lou]

What brand is your boiler?

 

[g0jfp]

Worcester bosch 42cdi

 

[Scott_D]

Frost protection maybe?

 

[Danb]

Is it a new installation,
Or an existing problem?

 

[EvilDrPorkChop]

Have you tried cutting power to it for a minute or so and then knocking it back on? That usually sorts them, failing that you'll need a GSR as I've had it before and it'll need a new part.

 

[g0jfp]

Is it a new installation,
Or an existing problem?

hi
its a old system around 6 years old
only just started to happen last week
the boiler tripped the RCD on fuseboard
and this has just started humming on pipes
we just turn boiler off now at night
any idears
cant get boiler guy out for 2 weeks who fitted it
thanks for any help
john
[automerge]1571949519[/automerge]

Have you tried cutting power to it for a minute or so and then knocking it back on? That usually sorts them, failing that you'll need a 'Registered Professional Gas Engineer' as I've had it before and it'll need a new part.

iv turned boiler off for 10 mins
see what tonight brings
let you no tomorrow
thanks